So 6 voicecoils in parallel pushing on 6 sides of a cube is the best omnipole? They sell transducer coils that mount to any flat surface. Maybe make a 6 sided foam core cube with 6 of these things? How to mount it to a floor wall, etc? Has to come tnrough vertex....
Interesting...

Actually I"m using floor underlayment remnainents from when the water heater failed (a sad story for another thread ) and one full 4x8 sheet from that episode. 24" will provide a little longer horn so I'll take your advise and size accordingly.

If you made the mini Cornucopya from foam core facers you will have several 10 x 20 inch remnants. What to do with them? I have been meaning to make a little stereo mp3 player unit and plan to use some cheap pc speakers and amplifier but wanted a transmission line to boost the bass output. Based on remnants that I had, I came up with an A-frame shaped enclosure. There are two TL's each 40 in long (or 1 m), which gives a tuning freq of 85 Hz. The TL will be a little odd in that due to how it is folded using triangular divider channels, the cross sectional area contracts, expands, contracts, and expands before exiting at the front facing terminus. There is no real design here with regards to optimizing the TL as it was based purely on whatever I have left over in foam core remnants. However, I will place the driver at the 1/3 distance from the closed end. The speakers I will be using are the $6.99 specials from Microcenter ('Inland' brand http://www.microcenter.com/product/2...tereo_Speakers) which claim to have a 3.6 watts per channel amp and oblong shaped 2 in x 3.5 in fullrange drivers. Here is what I managed to build in 1 hour this morning. Now I need to find some time to dismantle the speakers to strip out drivers and amp. I plan to mount the amp internally so that the whole thing will be self contained. I actually like how the design came out, it looks clean and modern, and because it is triangular, very stiff and needed no bracing. The tilt on the front baffle allows the driver to aim up a little bit which is good for a tabletop speaker. Oh, one more thing.... Now that I know how to record decent sound clips, I plan on recording a test track with original speakers as is from factory at same setting and distance. Then I will record the same with the new design and we will hear if the TL box improves the sound?

Those speakers from Microcenter are really bad once I took them apart. The drivers are cheesy with no real foam surround just pleated self paper from the cone, and the amp is already giving intermittent sound now that I pulled it out, bad pot on vol knob, and the chip is a TEA2035b which only 2.3 w into 4 ohms at 9 v power supply according to spec sheet. So the 3.6 w rating was a lie - what do you expect from bottom of the barrel speakers? I am just so disappointed in these compared to Logitech s120's which are only a few dollars more. I am rethinking what to put in this cabinet now that I like the shape so much.